from django.db.models import Avg, Max, Min, Sum In [369]: from StoreWeb.models import Product, Price In [370]: Price.objects.all().aggregate(Min('value'))

[Mirian Pardo]

OperationalError Traceback (most recent call last)
~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)

85 else:

---> 86 return self.cursor.execute(sql, params)

87

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/mysql/base.py in execute(self, query, args)

73 # args is None means no string interpolation

---> 74 return self.cursor.execute(query, args)

75 except Database.OperationalError as e:

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in execute(self, query, args)

205 assert isinstance(query, (bytes, bytearray))

--> 206 res = self._query(query)

207 return res

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in _query(self, q)

318 self._result = None

--> 319 db.query(q)

320 self._do_get_result(db)

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/connections.py in query(self, query)

258 query = bytes(query)

--> 259 _mysql.connection.query(self, query)

260

OperationalError: (2006, 'MySQL server has gone away')

The above exception was the direct cause of the following exception:

OperationalError Traceback (most recent call last)
<ipython-input-367-52af1526b6a5> in <module>

---

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/query.py in aggregate(self, *args, kwargs)

382 if not query.annotations[alias].contains_aggregate:
383 raise TypeError("%s is not an aggregate expression" % alias)

--> 384 return query.get_aggregation(self.db, kwargs)

385
386 def count(self):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/sql/query.py in get_aggregation(self, using, added_aggregate_names)

501 outer_query.select_related = False
502 compiler = outer_query.get_compiler(using)

--> 503 result = compiler.execute_sql(SINGLE)

504 if result is None:
505 result = [None] * len(outer_query.annotation_select)

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/models/sql/compiler.py in execute_sql(self, result_type, chunked_fetch, chunk_size)

1150 cursor = self.connection.cursor()
1151 try:

-> 1152 cursor.execute(sql, params)

1153 except Exception:
1154 # Might fail for server-side cursors (e.g. connection closed)

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in execute(self, sql, params)

98 def execute(self, sql, params=None):
99 with self.debug_sql(sql, params, use_last_executed_query=True):

--> 100 return super().execute(sql, params)

101
102 def executemany(self, sql, param_list):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in execute(self, sql, params)

66
67 def execute(self, sql, params=None):

---> 68 return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

69
70 def executemany(self, sql, param_list):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute_with_wrappers(self, sql, params, many, executor)

75 for wrapper in reversed(self.db.execute_wrappers):
76 executor = functools.partial(wrapper, executor)

---> 77 return executor(sql, params, many, context)

78
79 def _execute(self, sql, params, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)

84 return self.cursor.execute(sql)
85 else:

---> 86 return self.cursor.execute(sql, params)

87
88 def _executemany(self, sql, param_list, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/utils.py in exit(self, exc_type, exc_value, traceback)

88 if dj_exc_type not in (DataError, IntegrityError):
89 self.wrapper.errors_occurred = True

---> 90 raise dj_exc_value.with_traceback(traceback) from exc_value

91
92 def call(self, func):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/utils.py in _execute(self, sql, params, *ignored_wrapper_args)

84 return self.cursor.execute(sql)
85 else:

---> 86 return self.cursor.execute(sql, params)

87
88 def _executemany(self, sql, param_list, *ignored_wrapper_args):

~/env38/StoreVirtual/lib/python3.8/site-packages/django/db/backends/mysql/base.py in execute(self, query, args)

72 try:
73 # args is None means no string interpolation

---> 74 return self.cursor.execute(query, args)

75 except Database.OperationalError as e:
76 # Map some error codes to IntegrityError, since they seem to be

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in execute(self, query, args)

204
205 assert isinstance(query, (bytes, bytearray))

--> 206 res = self._query(query)

207 return res
208

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/cursors.py in _query(self, q)

317 db = self._get_db()
318 self._result = None

--> 319 db.query(q)

320 self._do_get_result(db)
321 self._post_get_result()

~/env38/StoreVirtual/lib/python3.8/site-packages/MySQLdb/connections.py in query(self, query)

257 if isinstance(query, bytearray):
258 query = bytes(query)

--> 259 _mysql.connection.query(self, query)

260
261 def _bytes_literal(self, bs):

OperationalError: (2006, 'MySQL server has gone away')